GB2391142B - Key management for content protection - Google Patents

Key management for content protection

Info

Publication number
GB2391142B
GB2391142B GB0325825A GB0325825A GB2391142B GB 2391142 B GB2391142 B GB 2391142B GB 0325825 A GB0325825 A GB 0325825A GB 0325825 A GB0325825 A GB 0325825A GB 2391142 B GB2391142 B GB 2391142B
Authority
GB
United Kingdom
Prior art keywords
key management
content protection
protection
content
management
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
GB0325825A
Other versions
GB0325825D0 (en
GB2391142A (en
Inventor
Yevgeny Yakov Gene Itkis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Synamedia Ltd
Original Assignee
NDS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IL130963A external-priority patent/IL130963A/en
Application filed by NDS Ltd filed Critical NDS Ltd
Priority claimed from GB0015857A external-priority patent/GB2353682B/en
Publication of GB0325825D0 publication Critical patent/GB0325825D0/en
Publication of GB2391142A publication Critical patent/GB2391142A/en
Application granted granted Critical
Publication of GB2391142B publication Critical patent/GB2391142B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
    • H04L9/0833—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key
    • H04L9/0836—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key using tree structure or hierarchical structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
GB0325825A 1999-07-15 2000-06-28 Key management for content protection Expired - Lifetime GB2391142B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IL130963A IL130963A (en) 1999-07-15 1999-07-15 Key management for content protection
US09/502,867 US6880081B1 (en) 1999-07-15 2000-02-11 Key management for content protection
GB0015857A GB2353682B (en) 1999-07-15 2000-06-28 Key management for content protection

Publications (3)

Publication Number Publication Date
GB0325825D0 GB0325825D0 (en) 2003-12-10
GB2391142A GB2391142A (en) 2004-01-28
GB2391142B true GB2391142B (en) 2004-03-31

Family

ID=29783026

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0325825A Expired - Lifetime GB2391142B (en) 1999-07-15 2000-06-28 Key management for content protection
GB0401092A Expired - Lifetime GB2394629B (en) 1999-07-15 2000-06-28 Key management for content protection

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0401092A Expired - Lifetime GB2394629B (en) 1999-07-15 2000-06-28 Key management for content protection

Country Status (1)

Country Link
GB (2) GB2391142B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7634223B2 (en) * 2004-07-12 2009-12-15 Motorola Inc. Method and apparatus for controlling a delivery of a broadcast-multicast flow in a packet data communication system
CN101164274B (en) 2005-04-25 2011-01-26 诺基亚公司 Group key generating method and device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8501211A (en) * 1985-04-29 1986-11-17 Philips Nv KEY STORAGE AND DISTRIBUTION SYSTEM FOR CRYPTOGRAPHICALLY SECURE COMMUNICATION.
US5754659A (en) * 1995-12-22 1998-05-19 General Instrument Corporation Of Delaware Generation of cryptographic signatures using hash keys
US6240188B1 (en) * 1999-07-06 2001-05-29 Matsushita Electric Industrial Co., Ltd. Distributed group key management scheme for secure many-to-many communication

Also Published As

Publication number Publication date
GB0401092D0 (en) 2004-02-18
GB2394629B (en) 2004-06-09
GB0325825D0 (en) 2003-12-10
GB2394629A (en) 2004-04-28
GB2391142A (en) 2004-01-28

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20090528 AND 20090603

PE20 Patent expired after termination of 20 years

Expiry date: 20200627